Perhaps you should try some spelling variations:
"synchronised swimming" » "synchronize swimming", "synchronising swimming"
"synchronised stemming" » "synchronize stemming", "synchronising stemming", "synchronised streaming", "synchronised steering", "synchronised stealing"
"synchronised stepping" » "synchronize stepping", "synchronising stepping", "synchronised stopping", "synchronised shopping", "synchronised shipping"
"synchronised flemming" » "synchronize flemming", "synchronising flemming", "synchronised fleming"
"synchronism stemming" » "synchronism streaming", "synchronism steering", "synchronism stealing", "synchronize stemming", "synchronising stemming"
"synchronized stepping" » "synchronized stopping", "synchronized shopping", "synchronized shipping"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("synchronised swimming") OR ((((((("synchronised stemming") OR ((("synchronised stepping") OR ("synchronized stepping"))))) OR ("synchronised flemming"))) OR ("synchronism stemming"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"synchronised swimming\") or (((((((\"synchronised stemming\") or (((\"synchronised stepping\") OR (\"synchronized stepping\"))))) or (\"synchronised flemming\"))) or (\"synchronism stemming\"))))~".
• Removing quotes may allow a broader search: (( synchronised swimming ) or ((((((( synchronised stemming ) or ((( synchronised stepping ) OR ( synchronized stepping ))))) or ( synchronised flemming ))) or ( synchronism stemming ))))~.
• Adding a wildcard symbol may retrieve word variants: (("synchronised swimming") or ((((((("synchronised stemming") or ((("synchronised stepping") OR ("synchronized stepping"))))) or ("synchronised flemming"))) or ("synchronism stemming"))))*.